JP2574625Y2 - Press-down head with nozzle for vertical pump - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press-down head with a nozzle for a vertical pump.

[0002]

[Prior art]

In this type of press-down head, if the liquid is left for a long time with the liquid attached to the inner surface of the nozzle after discharging, the liquid dries and solidifies, so that the nozzle hole becomes narrower and the liquid is ejected. In some cases, it was defective and clogging occurred in some cases. Such inconvenience can be solved by, for example, a press-down head with a nozzle described in Japanese Utility Model Application Laid-Open No. 1-128859 shown in FIG.
From the front of the dish-shaped base 20 with the upper surface opening, the stem fitting cylinder 21
Head body 23 having a nozzle 22 communicating with the head protruding forward.
And a lower plate-shaped base 24 for closing the upper surface of the plate-shaped base 20.
Of the nozzle 22 is pivotally attached to the front of the dish-shaped base, and the front of the plate protruding forward from the front of the dish-shaped base 24 is bent downward. A lid member 27 having a front end face closed, an upper surface of the dish-shaped base 27 and a dish-shaped base 2
And a spring 28 interposed between the lower surface of the lower plate 4 and the spring 28 for urging the rear portion of the lower plate base upward. The lower portion of the lower plate base 24 is pressed down against the elasticity of the spring 28 to form a nozzle hole. Is formed so as to be able to open the front end face.

However, in the above-mentioned conventional example, there is a disadvantage that the structure of the pressing head is slightly complicated and the cost is increased.

In the present invention, a discharge valve having a simple structure is formed at the front end of the nozzle to prevent the liquid from adhering to the inner surface of the nozzle and hinder the dispensing, and is provided at a low cost.

[0005]

A press-down head with a nozzle that projects a nozzle forward from a front portion of a head body.
A closure in which the outer surface of the hollow cylinder 4 is fitted to the inner surface of the front part of the nozzle 2, and the vertical plate-shaped valve seat 6 is supported by a plurality of columns 5 protruding forward of the nozzle 2 from the front end of the hollow cylinder. A member 12 and a fitting cylinder 7 fitted to the outer surface of the nozzle 2
Is formed to extend in front of the nozzle 2, and the extension forming portion 2 is formed.
a elastic cylinder 13 in which the front inner surface of a is fitted to the outer peripheral surface of the vertical plate-shaped valve seat 6 to close the front end surface of the extension forming portion 2a, and the extension forming portion 2a is formed so as to be able to expand and deform. Formed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 denotes a press-down head with a nozzle. The press-down head with a nozzle protrudes forward from a nozzle 2 from a front portion of a peripheral wall of a head body 11 and forms an engaging ridge 9 on a rear outer surface of the nozzle. Has been established.

[0007] 12 is a closing member, the closing member,
The hollow cylinder 4 is screwed into the front inner surface of the nozzle 2, and the rear surface of the outward flange-shaped wall 8 attached to the front end of the hollow cylinder is engaged with the front end surface of the nozzle 2. The vertical plate-shaped valve seat 6 is supported by a plurality of columns 5 projecting from the front surface of the wall 8 toward the front of the nozzle 2.

Reference numeral 13 denotes an elastic cylinder. The elastic cylinder extends forward with a fitting cylinder 7 fitted to the outer surface of the nozzle 2 and extends the front inner surface of the extension forming part 2a in the vertical direction. The front end face of the extension forming portion 2a is closed by fitting to the outer peripheral surface of the plate-shaped valve seat 6, and the extension forming portion 2a is formed so as to be capable of expanding and deforming. The engaging projection 9 is engaged with the peripherally provided engaging recess to prevent the fitting cylinder 7 from coming off. In this case, as shown by an imaginary line in FIG. 1, the fitting cylinder portion 10 behind the engagement concave portion is formed thick to increase the rigidity of the portion, so that the fitting cylinder portion 7 is more difficult to be pulled out. It can also be. The elastic cylinder is formed of synthetic rubber, soft synthetic resin, or the like.

When the press-down head of the present invention is mounted on the stem of a known vertical pump and the press-down head of the present invention is pressed down in this state, pressurized liquid flows into the nozzle 2 and FIG. As described above, since the extension forming portion 2a of the elastic cylinder 13 is expanded and deformed, the front end face of the extension forming portion is opened, the pressurized liquid is injected, and when the pouring is completed, the extension forming portion 2a is elastically restored. As a result, the front end face of the extension forming portion 2a is closed.

[0010]

According to the present invention, a plurality of columns 5 project from the front end of a hollow cylinder 4 fitted to the inner surface of the front part of the nozzle 2, and these columns form a vertical plate. A fitting tube portion 7 that supports the valve seat 6 and is fitted to the outer surface of the nozzle 2 is formed to extend forward, and the inner surface at the front of the extension forming portion 2a is formed on the outer peripheral surface of the vertical plate-like valve seat 6. And its extension forming part 2
a is formed so as to be capable of expanding and deforming, so that at the time of non-injection, the front end of the extension forming portion 2 a is closed by the vertical plate-shaped valve seat 6 to prevent outside air from flowing into the nozzle 2, and It is possible to prevent the adhering liquid from drying or solidifying to hinder the injection. Also, with the above configuration, when the pressurized liquid flows into the extension forming part 2a during the injection, the extension forming part 2a When the front end surface of the extension cylindrical portion is opened and the injection is completed, the extension forming portion 2a is elastically restored, and the front end surface of the extension forming portion is closed. The front end face of 2a can be opened and closed without any trouble, and since the structure is simple, it can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a pressing head according to the present invention.

FIG. 2 is an exploded perspective view of a main part of the embodiment.

FIG. 3 is a longitudinal sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Depression head 12 ... Closure member 13 ... Elastic cylinder

Claims (1)

(57) [Scope of request for utility model registration] A press-down head with a nozzle protruding a nozzle from a front portion of a head body; an outer surface of a hollow cylinder fitted to an inner surface of a front portion of the nozzle;
And a closing member 1 in which a vertical plate-shaped valve seat 6 is supported by a plurality of columns 5 projecting forward from a front end of the hollow cylinder toward the nozzle 2.
2 and a fitting cylinder 7 fitted to the outer surface of the nozzle 2
While extending forward, the front inner surface of the extension forming portion 2a is fitted to the outer peripheral surface of the vertical plate-shaped valve seat 6 to close the front end surface of the extension forming portion 2a, and the extension forming portion 2a is closed. A press-down head with a nozzle for a vertical pump, comprising an elastic cylinder 13 formed so as to be capable of expanding and deforming.